/Engine/Source/Editor/UnrealEd/Public/Kismet2/BlueprintEditorUtils.h
Find the interface Guid for a function if it exists.
static [FGuid](API\Runtime\Core\Misc\FGuid) FindInterfaceFunctionGuid ( const [UFunction](API\Runtime\CoreUObject\UObject\UFunction) * Function, const [UClass](API\Runtime\CoreUObject\UObject\UClass) * InterfaceClass )